For those who have completed the game and also for those struggling with the difficulty, there's two new modes available to satisfy both.
Firstly, if you're finding it too difficult there's a new more relaxed mode, allowing you to play the game at your own pace and enjoy the story a little more. You can now pick your difficulty when starting a new game.
If you've completed the game, you can now go through a Boss Rush game mode as you battle against increasingly difficult bosses.
Easily one of my favourite adventure platformers to be released with Linux support. You can see my original thoughts here.